.absolute_with_domain {
    background-image: url("http://example.com/css/absolute_with_domain.png");
}

.absolute_no_proto {
    background-image: url("//example.com/css/absolute_no_proto.png");
}


.absolute_path {
    background-image: url("/css/absolute_path.png");
}


.data {
    background: url() no-repeat left center;
}